I have a Canon Digital Rebel with a Canon 420 EX Speedlite. When I take an inside picture with the Speedlite on in the Auto mode(or any mode for that matter) the picture comes out about 95% dark, I can faintly make out the image but barely. When I remove the Speedlite and use the little built in flash then the photo comes out just fine. I called Canon and they seem to think the Flash may be bad and that I would need to send it in. I restored all factory defaults and have the same results. My wife and I just had a new baby 1 week ago and the picture quality with the little built in flash sucks and its killing me to not get good pictures of her as I did with my son. I've had this set up for about 5 years and have had flawless use of it. Thanks alot,,, I appreciate it!